I used to play this app when I was bored: https://play.google.com/store/apps/details?id=com.hackedapp https://play.google.com/store/apps/details?id=com.hackedap

I used to play this app when I was bored: https://play.google.com/store/apps/details?id=com.hackedapp https://play.google.com/store/apps/details?id=com.hackedapp It had a cool keyboard that would only show words that are syntactically valid for the cursor position. It probably would need some alterations for a real language, but it's a lot better than just a qwerty keyboard